godot: modules/mono/mono_gd/gd_mono_utils.cpp:371 - System.ArgumentException: Illegal characters in path.

Godot version: v3.2.2.beta4.mono.official

OS/device including version:

Windows 10 Pro 1909

Issue description:

When opening a project, in the editor output, I get flooded with about 20 of the following errors: modules/mono/mono_gd/gd_mono_utils.cpp:371 - System.ArgumentException: Illegal characters in path These then change to: modules/mono/mono_gd/gd_mono_utils.cpp:371 - System.NullReferenceException: Object reference not set to an instance of an object which continue as long as the editor is open.

These are expanded in the console as:

Unhandled Exception:
System.ArgumentException: Illegal characters in path.
  at System.IO.Path.Combine (System.String path1, System.String path2) [0x0003e] in <34e7ab706f1141f9b981d74fbe2f5560>:0
  at GodotTools.Utils.OS+<>c__DisplayClass39_0.<PathWhichWindows>b__1 (System.String dir) [0x00000] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at System.Linq.Enumerable+SelectListIterator`2[TSource,TResult].MoveNext () [0x00048] in <fdc50bfd761741c0a0c2f052bf074a1c>:0
  at System.Linq.Enumerable+<SelectManyIterator>d__167`3[TSource,TCollection,TResult].MoveNext () [0x000d1] in <fdc50bfd761741c0a0c2f052bf074a1c>:0
  at System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate, System.Boolean& found) [0x0004f] in <fdc50bfd761741c0a0c2f052bf074a1c>:0
  at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00000] in <fdc50bfd761741c0a0c2f052bf074a1c>:0
  at GodotTools.Utils.OS.PathWhichWindows (System.String name) [0x00111] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at GodotTools.Utils.OS.PathWhich (System.String name) [0x0000e] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at GodotTools.BuildManager.Initialize () [0x00023] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at GodotTools.GodotSharpEditor.EnablePlugin () [0x00453] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
ERROR: debug_send_unhandled_exception_error: System.ArgumentException: Illegal characters in path.
   At: modules/mono/mono_gd/gd_mono_utils.cpp:371

and

Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object
  at GodotTools.HotReloadAssemblyWatcher.RestartTimer () [0x00000] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at GodotTools.HotReloadAssemblyWatcher._Notification (System.Int32 what) [0x00008] in <bf243baa94fe41ccbd98c8bbc3a78900>:0
  at (wrapper managed-to-native) System.Threading.Monitor.Exit(object)
  at Godot.GodotTaskScheduler.ExecuteQueuedTasks () [0x00050] in <e870abd78d2142af92585d192bb3eb0a>:0
  at Godot.GodotTaskScheduler.Activate () [0x00001] in <e870abd78d2142af92585d192bb3eb0a>:0
  at (wrapper native-to-managed) Godot.GodotTaskScheduler.Activate(Godot.GodotTaskScheduler,System.Exception&)
ERROR: debug_send_unhandled_exception_error: System.NullReferenceException: Object reference not set to an instance of an object
   At: modules/mono/mono_gd/gd_mono_utils.cpp:371

respectively.

Steps to reproduce:

Run Godot 3.2.2 beta4 mono win64.
Create a new project. I used a new folder: C:\Users\Marcel\Downloads\Godot\Test Mono Beta 4

Minimal reproduction project: None required.

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 27 (14 by maintainers)

Most upvoted comments

Ok, managed to reproduce it by visiting here…

https://www.soscisurvey.de/tools/view-chars.php

…I copied the space between ‘string…’ and ‘or’ which contains a few odd characters and pasted onto the end of one my path directories in the windows ‘edit text’ section of its environment var’s editors.

Tried to fire up Godot and I’m back to seeing the issue, remove the characters and all’s well again.

8bitdna on Oct 17, 2020

If the problem was with illegal characters in PATH, we can make PathWhich check for that. Still weird to have such bad entries in PATH. I hope that’s indeed the case and not some encoding problem on our code.

neikeq on Oct 17, 2020

@xahon I’ve opened #64085 that should fix your issue, or at least it should prevent the exception, it’d be interesting to know how invalid characters ended up in the mono/editor/editor_path_optional setting. Could you check what you have that value set to?

raulsntos on Aug 7, 2022

I had this issue but solved it with a hint from @neikeq in the comment above regarding the environment PATH variable. I first went through and checked all the directories / folders actually existed in my PATH var and was still getting the error.

I echoed out PATH into a terminal session and all looked ok there… So I went into the Windows system properties environment variables GUI and in there you we get a list of the elements making up the path in a list, all looked ok still…

So I hit the ‘edit text’ button you get there and scanning through and sure enough there was a load of whitespace or maybe non-printable chars, anyway, removed those characters out and everything started working again.

😃

8bitdna on Oct 17, 2020

How do I run Godot with an env variable?

Press <kbd>Windows + R</kbd> and enter cmd in the Run dialog to open a command prompt.
Paste the following line into the command prompt and press <kbd>Enter</kbd> (you may need to press it twice):

set GODOT_MONO_DEBUGGER_AGENT=--debugger-agent=transport=dt_socket,address=127.0.0.1:22685,embedding=1,server=y,suspend=n

Use the cd <path> command to reach the directory where your Godot executable is located. You can drag-and-drop a folder to the command prompt to get its path.
Use <name of Godot executable>.exe C:\Path\to\project.godot to open the project directly in the editor. (The project must be opened directly, as the project manager won’t pass environment variables to the editor.)

Calinou on Sep 9, 2020